Google - The search-engine giant reported first-quarter earnings of $10.08 a share, outstripping expectations for $9.65 a share. Meanwhile, revenue was in line with estimates at $8.14 billion, according to a consensus estimate from Thomson Reuters.

The company also announced plans to create a new class of non-voting capital stock, which will be listed on the Nasdaq. The shares will be distributed via a stock dividend to all existing stockholders.

Best Buy - The company's board is creating a committee to search for a new CEO. This comes after outgoing CEO Brian Dunn abruptly resigned earlier this week after the electronics retailer began investigating allegations of personal misconduct.

Coinstar - The firm boosted its first-quarter outlook on strong demand at its Redbox DVD rental kiosks. Shares soared almost 20 percent following the news.

Barnes & Noble - The book retailer announced a new version of its Nook, which will include the world’s first E Ink device with patent-pending lighting technology. The new e-reader will be sold for $139.

Kinder Morgan - The energy company announced it will expand its west-coast Canada oil pipeline for $5 billion, which will double the capacity of crude it can ship to Vancouver and Washington's Puget Sound.